Post-Jama'at Al-Muslimin
According to journalist Robin Wright the group reorganized and within a year of Mustafa's death membership was estimated "to be as high as 4000."
Many succeeding militant Islamists and Islamist groups have been designated Takfir wal-Hijra by authorities. Both Osbat al-Ansar in Lebanon and the GIA in Algeria were initially described as Takfir wal-Hijra cells. Kassem Daher, the killers of mosque worshippers in Sudan in 2000, the killer of Dutch filmmaker Theo Van Gogh and a 2011 group of Egyptian gunmen, have been called Takfir wal-Hijra or connected with Takfir wal-Hijra in some way.
Despite these references, according to Jane's World Insurgency and Terrorism there is little or no evidence of any connection between the original Jama'at al-Muslimin and groups who've been called al-Takfir wal-Hijra, and little or no evidence of any group using the name "Takfir" to describe themselves. This is because in the Muslim world Takfir is "generally used as a derogatory description for extremists that kill Muslims without sufficient religious justification".
Read more about this topic: Jama'at Al-Muslimin